Internal combustion engine



May 14, 1935. LANG INTERNAL comausnpn ENGINE Original Filed Dec. 1, 1930 Patented May 14, 1935 7 2,001,536 INTERNAL COIVIB USTION ENGINE Franz Lang, Munich, Germany, assignor to Ltanova Aktiengesellschaft, Vaduz, Liechtens ein Original application December 1, 1930, Serial No.

499,224. Divided and this application November 1, 1933, Serial No. 696,156. In Germany March 6, 1929 2 Claims. (Cl. 12332) My invention relates to a fuel injection internal combustion engine of the type which embodies an air storage chamber in which fluid is compressed during the compression stroke of the piston and from which fluid issues during the working stroke of the piston.

This application is a division of my copending application, Serial No. 499,224, filed December 1, 1930, for Internal combustion engines.

The instant invention is directed to an improved air storage construction, to the end of obtaining ease in starting of the engine and assuring thorough mixing of the fuel charge in the operation of the engine.

In the drawing:

Figure 1 is an axial sectional view through the outer end portion of a cylinder and the head thereof of an engine embodying my invention, parts being shown in elevation;

Figure 2 is a longitudinal sectional view through the air storage chamber, on an enlarged scale,

parts being shown in elevation;

Figure 3 is a section taken substantially on line A-B of Fig.2; I

Figure 4 is a view similar to Figure 2, but showing a modified form of air storage chamber; and

Figure 5 is a section taken substantially on line C--D of Figure 4.

I have illustrated by invention, by way of example, as applied to an injection engine comprising a cylinder structure 0, a head It therefor, and a piston 50 operating in the cylinder.

Head h and the adjacent end portion of the cylinder define a combustion chamber 0. An injection nozzle n is suitably mounted in the head, and is disposed to inject fuel into chamber 0. An air storage chamber (1 screws into a boss r at the side of the head, it being understood that any suitable number of air storage chambers may be provided.

The chamber it comprises an outer cylindrical casing d and an inner flanged nozzle member e, in the form of a Venturi, which seats in boss T and is held therein by casing d, and a disc I held.

the outer portion of stem s, and a compressioncoil spring 1 is disposed about the stem and confined between arm g and a cup washerm which abuts a cotter pin k secured through stem s.

Spring i holds disc I snugly against wall u of casing d while permitting turning of the disc by means of arm 9.

The air chamber a comprises a main chamber 2, defined by casing d, and a preliminary-chamber x, defined by disc f and the inner portion of member e. Disc f is provided with two ports I and, when the engine is in operation, is turned into position to bring parts 1" into register with ports 11. in wall u. During the compression stroke of the piston p fluid from above the piston, mostly pure air, is forced into chamber a and there stored under high pressure. Injection of fuel may occur as the piston approaches upper dead center and may continue during a predetermined portion of the working stroke of the piston. As the piston moves down, air is ejected at high velocity through Venturi member e into the combustion chamber 0. This creates high turbulence of the fuel charge and assures thorough intermixing of the fuel and the air, which contributes to smoothness and efficiency in operation of the engine.

The capacity of preliminary chamber a: is such that the compression will be suflicient, as the piston approaches its position of greatest compression, to cause ignition of the fuel charge when the engine is cold. In starting, disc 1 is turned so as to move ports I thereof out of register with ports u of wall a and cut off communication between preliminary chamber a: and main chamber 1 of the air storage chamber a. After the engine is warmed up, disc I is turned into its normal position, rendering main chamber l available for air storage purposes, the total capacity of the storage chamber then being proper to assure most efficient operation of the engine in' the manner above described.

In the modified form of air storage chamber shown in Figures 4 and 5, a, suitably shaped valve plate y is secured upon the inner end of stem s, which is mounted for turning movement-in a thickened portion t of the wall of casing 01'. Valve plate y is provided with a port 2 which registers with port it of wall u in the normal position of the valve. The operation of. this form of air storage chamber is the same as that of the air storage chamber shown in Figures 1 to 4, inclusive, and need not be set forth in detail.

What I claim is:

1. In combination in an injection engine, a cylinder and a head therefor, a piston operating in the cylinder, an injection nozzle for injecting fuel into the combustion space of the cylinder, an air storage chamber comprising a Venturi member seating in said head and opening into said combustion space and a casing secured in 5 wall and the outer portion ofsaid Venturi member anair storage chamber of fixed capacity; said casing also defining anair storage chamber of fixed capacity, and means for adjusting the valve and thereby controlling communication between 10 said chambers of said storage chamber.

2. In combinationin-an injection engine, a cylinder and a head therefor, a piston operating in the cylinder, an injec on nozzle disposed to inject fuel into the comb tion space of the cylnrend byaportedwall, aportedvalve atthe innersideotsaidwallanddefiningwlthsaid wall and the outer portion oi said .Yenturi member an air storage chamber 0! axed capacity. said casingalsodefininganairchamberot fixed capacity, and means tor-adjusting the valve 10 and thereby controlling communication between said chambers of said air storage chamber.

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